Bloodsoaked Ruins is the closest fit on the game's own numbers: Kachina's kit multiplies DEF, and a weapon is ranked here on whether its ascension stat and its passive act on that stat. Crimson Moon's Semblance, Footprint of the Rainbow and Primordial Jade Winged-Spear come next. No playtested ranking has been imported for Kachina, so this is arithmetic over the kit data rather than a damage measurement.
Run Archaic Petra on Kachina, with Husk of Opulent Dreams and A Day Carved From Rising Winds behind it. Main stats are DEF% sands, Geo DMG Bonus goblet, CRIT Rate / CRIT DMG circlet. Roll substats in the order CRIT Rate > CRIT DMG > DEF% > Energy Recharge.
Talent priority is Normal Attack > Elemental Skill > Elemental Burst. The Elemental Burst costs 70 energy, which is what an Energy Recharge target has to clear.
The strongest team is Mualani, Kachina, Xiangling and Zhongli, built around Kachina: Geo · Vaporize.